Search FAQs

What is the operating voltage tolerance, catalog numbers, and clearing times for the Masterpact NT and NW shunt trip and shunt close coils?

Issue:
What is the operating voltage tolerance, catalog numbers, and clearing times for the Masterpact NT and NW shunt trip and shunt close coils?

Product Line:
Masterpact NT NW

Resolution:
Shunt trip: operating threshold is 0.7x to 1.1x Vn (nominal voltage)
Shunt close: operating threshold is 0.85x to 1.1x Vn
Catalog numbers are the same for MX and MN (shunt trip and shunt close) devices; function is determined by placement in the breaker.

Voltage (V) at 50/60 Hz	T-, W-, & Y-Frame Fixed	T-Frame Drawout	W- & Y-Frame Drawout
12 DC	S47359	S33809	S48490
24-30 AC/DC	S47360	S33810	S48491
48-60 AC/DC	S47361	S33811	S48492
100-130 AC/DC	S47362	S33812	S48493
200-240 AC/DC	S47363	S33813	S48494
277 AC	S47364	S33814	S48495
380-480 AC	S47365	S33815	S48496

MX operating time at Vn: 50 ms ±10 (NW and NT)
XF operating time at Vn:
70 ms ±10 (NW ≤ 4000 A)
80 ms ±10 (NW > 4000 A)
55 ms (NT)

NOTE: Shunt trip (MX) and shunt close (XF) circuits must be energized for a minimum of 200 ms. In other words, don't use an impulse signal. Use a signal of at least 200 ms.